The Nautilus U618 and Nautilus U616 are both high-quality upright exercise bikes, with the U618 belonging to the new Nautilus Performance Series designed for higher intensity workouts.

Both the Nautilus U618 and U616 offer lots of features and options to keep your workouts varied and challenging, including a variety of 29 programs and 25 levels of ECB resistance for smooth and quiet operation.

The Nautilus U618 Upright Bike has the advantage of a tilting Sightline console that can be adjusted to get the best viewing angle for different riders. Both the Nautilus U618 and U616 have dual blue-backlit LCD displays but the U618 uses an STN display that is considered to be the best in the fitness industry, offering a wider viewing angle and better visual colors that’s easier on the eyes.

Both the Nautilus U168 and U616 offer 4 user profiles so 4 different people can keep track of your workout stats on the machine. Both exercise bikes also offer Bluetooth connectivity for goal tracking on Nautilus Connect or My Fitness Pal.

Additional premium features on both the Nautilus U618 and U616’s consoles include a 3-speed cooling fan, speakers with MP3 input, USB charging port and media tray. Both exercise bikes feature contact grip and telemetry enabled heart-rate monitors so you can keep within your target heart-rate goal.

The Nautilus U618 exercise bike has the added convenience of In-Reach remote buttons to quickly change the resistance levels (located on top of the handlebars). Both the bikes’ handlebars are angle-adjustable and feature comfortable elbow rests, although the elbow rests are larger on the U618.

The Nautilus U618 and U616 Upright Exercise Bikes have different seats to each other, with the U616 having a padded contoured seat while the U618 has a gel seat that helps to cushion the glutes for a more comfortable ride over longer workouts. The seats on both bikes are 4-way adjustable, i.e. they can be adjusted forwards/backwards/up/down for a custom fit.

Nautilus U618's gel cushioned seat

Nautilus U616's padded seat

The Nautilus U618 and U616 exercise bikes are both sturdily constructed and feature integrated levelers for added stability. The Nautilus U618 supports a slightly higher user weight capacity of up to 325 lbs compared to the U616’s user weight capacity of up to 300 lbs. Both bikes come with transportation wheels for easy relocation.

Fitness tip: Just a 30 minute cycling workout could burn between 207-345 calories for women, or 252-420 calories for men, depending on the intensity of the cycling.

Let’s take a close look at the main differences and similarities in features and specifications between the Nautilus U618 and Nautilus U616 to help you decide on which is the best upright exercise bike for you:

I don’t think you’ll be disappointed with either of these 2 Nautilus Upright Exercise Bikes. As you can see from the above comparison, the Nautilus U618 is designed for more intensive use and provides comfort over longer-periods of training.

Both exercise bikes have plenty to offer, and for many people looking to exercise moderately in the comfort of their own home, the Nautilus U616 would be more than adequate for their needs and would save you some hard earned $$s!

Cycling in general is low-impact meaning that it’s kinder to your joints compared to many other forms of exercise, making it one of the easiest forms of exercise to stick to in the long term to reach your fitness goals.

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